Joint structure for metallic furniture.



J. BURNS.

JOINT STRUCTURE FOR METALLIC FURNITURE.

APPLICATION FILED ,xue.14. NIB.

1 ,258,532. Patented Mar. 5, 1918.

unirnn S l ri i ljifi JOHN BURNS, OF KENOSHA, WISCONSIN.

JOINT STRUCI"URE EGB METALLIC FURNITURE.

Application filed August 14, 1916.

To all whom it may concern:

3e it known that l, J HN Bonus, a citizen of the United States, residingat 701 Park avenue, in the city of Kenosha, county of Kenosha, and Stateof Wisconsin, do hereby declare that I. am the first, original, and soleinventor of a new and useful Improvement in Joint Structures forMetallic Furi'iiture, of which the following is a specification.

My invention relates to a joint structure for metallic furniture, suchas bedslcads, for rigidly securing together companion frame members, theaxes of which intersect each other at an angle.

The object of the invention is to provide a strong rigid and inexpensiveconnection between the parts which will present a neat appearance andwill avoid mutilation of the exposed surfaces in the vicinity of thejoint.

A further object of the invention is to permit of the rigid uniting oftwo members composed of different materials which could not be directlyelectrically welded to each other, or if when electrically welded wouldbe of low mechanical strength.

One exemplification of my invention is illustrated in the accompanyingdrawings, wherein,

Figure 1 is a perspective view of a portion of a metallic bedstead withparts broken away.

Fig. 2 is a broken out perspective view of one of the parts illustratedin Fig. 1.

Fig. 3 is a perspective view of the rivet or connecting member, and

Fig. 4: is a sectional view taken transversely through the joint shownin Fig. 1.

In the accompanying drawings, 1 indicates a metallic tubular cornerpost, or upright, of a metallic bedstead and 1 one of the cross rails,or tubes, which is here shown as a metallic tubular member ofsubstantially the same character as the post 1, but it will beunderstood that the member 1 may be different in character from thememher 1, that is, it may be of a different metal, or it may be solid,as for instance in the form of a wooden bar and it may be of any desiredcross sectional shape.

Specification of Letters Patent.

.Batented Mar. 5, 1918.

Serial No. 114,635.

2 designates a ferrule of substantially cupshape providing a socket forreceiving one end of the member 1 and having a closed end designed toabut against the surface of the member 1 and provided axially with anopening 3, which receives the shank l of the metallic rivet illustratedin Fig. This rivet is provided with a head 5, providing marginal portiondesigned to overlie and contact with the inner surface of the closed endof the ferrule 2 about the wall of the opening 3 therein and the end 6of the shank of the rivet is intended to be welded to the contiguousportion of the post 1. v

in effecting the weld any well-known or improved apparatus may beemployed. In this operation the post 1 preferably is used as oneelectrode and the companion electrode is brought in contact with theouter surface the head 5 of the rivet, and during the time the weldingcurrent is on considerable pressure applied to the electrode to insure agood contact with the head of the rivet, a good contact between the end6 of the shank and the post 1 and for forcing the aforesaid marginalsurface of the head into firm engagement with the inner surface of theclosed end of the ferrule. Thus after the weld is completed the ferrulewill be securely clamped between. the head of the rivet and the surfaceof the post 1 and a rigid connection formed between the latter and theshank of the rivet.

In effecting this weld there is no liability of the exposed surfaces ofthe post 1, ferrule 2 or cross rail 1 being marred, or in anywisemutilated, and this is of considerable importance in joining the partsafter they have been given a finish.

As is o. vious the material out of which the cross rail 1 is made is ofno importance, since its ends are simply supported in the socketprovided by the ferrule 2 and it is likewise of no importance that theferrule may not be of the same material as the post 1, or of a materialwhich could not be electrically welded thereto.

The described joint structure is particu larly desirable in themanufacture of metallic, or part-metallic, bedsteads, for the reaing andelectrically Welded at its end to the 10 first; named member, the headof said rivet being located Within the cup-shaped member andinterlocking with the end thereof about the axial opening therein, and athird member disposed at an angle to said tubular 15 member and havingits end supported in the socket provided by the cup-shaped member.

' JOHN BURNS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). C.

